Improvement in rotary engines



UNITED STATEs JOHN B. ADT, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Leiters Patent No. 146,630, (lated January 20, 1874; application tiled December 12, 1873.

To all whom it may concern Be it known that I, JOHN B. ADT, of Baltimore city, and State of Maryland, have invented a new and Improved Rotary Engine; and I do hereby declare that the following is a full, clear, and exact description of the saine, reference being had to the accompanying drawing forming a part of this specification, in which- Figure lis a vertical cross-section. Fig. 2 is a longitudinal vertical section.

rlhe invention relates to means whereby rotary engines may be more conveniently packed, the piston kept always radial to the center of shell, and the usual clapping noise avoided, all as hereinafter more fully described.

A represents a cylindrical shell, having a shat't, d, eccentrically journaled therein. W ith this shaft, and concentric therewith, rotates a circular disk, O, having the longitudinal recess c, converging to a neck near the periphery, and having in one side of this neck or not, according to the size of the engine, a frictionroll, b. E is the steam-chest, having steaminlet port e and exhaust el. Attached to the rotary disk O are the two ring-plates a a, havin g the large concentric apertures al, connected by the cross-plate or piston a?, tlush on the outer surface with the periphery of ring-plates, and made concentric with the shell, so as to turn steam-tight therein. The piston ce2 has an end packing, a3, and, being concentric with the shell, and made in one piece with the ringplates a a, bears always lirinly against the inside of the shell. The disk C, however, moves up and down on the piston during each rotation, being brought into contact, or nearly so, at the end c2 of the shortest radius of shell, when the upper end of piston nearly or quite coincides with the circumference of the disk. As soon as the piston reaches the exhaust-port 61, the valve e4 shuts oit the steam until it has passed the steam-inlet e. I am aware that a pist-on sliding in a cavity, C', of revolving disk (l is not new, but mine is a piston that does not slide in and out of center-piece, but is `unchangeable in its relative position to the center of the shell. It thus maintains a continuous perpendicularity to inside of shell, and is enabled without diflieulty to work steam-tight. It cannot stick, let steam blow through, or produce noise, because of its being in one solid piece with the plate rings, which move in a l journaled in one side of the neck of recess, and

made to project a little therefrom, to allow for the variation of the position of the disk O to that of the piston a2. The latter is thus kept always in the same plane with axis of shell, but never in the same plane witlrthe center of disk, except when at the point c2, and diametrically opposite thereto. It is believed that this engine is much les liable to get out of order by reason of the piston bein g in one piece with the ring-plates.

Having thus described my invention, what Q I claim as new, and desire to secure by Letters Patent, is

The combination with case A and the eccentric shaft d, that carries the disk C, of the ringplates a a, carrying piston a?, and slotted to allow the said shaft to move, in the manner and for the purpose described. i

JOHN B. ADT.

Witnesses:

J. M. MYERS, A. l). JUMP.

ATENT OFFICE. N 

